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I downloaded your jpg photo and openned it in Photoshop. The dots seems to be stars. They have more than only one pixel, therefore they aren't hot pixel (damaged pixel).
Maybe there are some hot pixels, and maily some noise, but as you told million of hot pixels... What I saw in the photo jpg is large number of stars in the background. Those stars don't appears in the RAW file. Perhaps only after a graphic process.
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